Difference between revisions of "Matrix - Button"

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(硬件连接)
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* If the button is not pressed S will output high otherwise S will output low.
 
* If the button is not pressed S will output high otherwise S will output low.
  
==硬件连接==
+
==Applications==
===连接NanoPi M1===
+
===Connect to NanoPi M1===
参考下图连接模块:<br>
+
Please refer to the following connection diagram to connect the module to the NanoPi M1:<br>
 
[[File:Matrix-Button_nanopi_m1.jpg|frameless|600px|Matrix-Button_nanopi_m1]]
 
[[File:Matrix-Button_nanopi_m1.jpg|frameless|600px|Matrix-Button_nanopi_m1]]
  
连接说明:
+
Connection Details:
 
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===连接NanoPi 2===
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===Connect to NanoPi 2===
参考下图连接模块:<br>
+
Please refer to the following connection diagram to connect the module to the NanoPi 2:<br>
 
[[File:Matrix-Button_nanopi_2.jpg|frameless|600px|Matrix-Button_nanopi_2]]
 
[[File:Matrix-Button_nanopi_2.jpg|frameless|600px|Matrix-Button_nanopi_2]]
  
连接说明:
+
Connection Details:
 
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===连接NanoPi M2 / NanoPi 2 Fire===
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===Connect to NanoPi M2 / NanoPi 2 Fire===
NanoPi M2和NanoPi 2 Fire的40 Pin引脚定义是一模一样的,所以它们操作Matrix配件的步骤是一样的,这里仅以NanoPi M2为例。<br>
+
Please refer to the following connection diagram to connect the module to the NanoPi M2/ NanoPi 2 Fire:<br>
参考下图连接模块:<br>
+
 
[[File:Matrix-Button_nanopi_m2.jpg|frameless|600px|Matrix-Button_nanopi_m2]]
 
[[File:Matrix-Button_nanopi_m2.jpg|frameless|600px|Matrix-Button_nanopi_m2]]
  
连接说明:
+
Connection Details:
 
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===连接NanoPC-T2===
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===Connect to NanoPC-T2===
参考下图连接模块:<br>
+
Please refer to the following connection diagram to connect the module to the NanoPC-T2:<br>
 
[[File:Matrix-Button_NanoPC-T2.jpg|frameless|600px|Matrix-Button_NanoPC-T2]]
 
[[File:Matrix-Button_NanoPC-T2.jpg|frameless|600px|Matrix-Button_NanoPC-T2]]
  
连接说明:
+
Connection Details:
 
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Revision as of 11:03, 17 June 2016

查看中文

1 Introduction

Button
  • The Matrix-Button module is used to detect button events.
  • If the button is not pressed S will output high otherwise S will output low.

2 Features

  • 3 PIN interface
  • PCB dimension (mm): 8 x 24

BTN-01.PCB

  • Pin Description:
Pin Description
S GPIO
V Supply Voltage 5V
G Ground

3 Basic Device Operation

  • The Matrix-Button is an instant(non self-lock) button. The button's status can be read from pin S in the 3-pin 2.54 mm spacing pin header.
  • If the button is not pressed S will output high otherwise S will output low.

4 Applications

4.1 Connect to NanoPi M1

Please refer to the following connection diagram to connect the module to the NanoPi M1:
Matrix-Button_nanopi_m1

Connection Details:

Matrix-Button NanoPi M1
S Pin7
V Pin4
G Pin6

4.2 Connect to NanoPi 2

Please refer to the following connection diagram to connect the module to the NanoPi 2:
Matrix-Button_nanopi_2

Connection Details:

Matrix-Button NanoPi 2
S Pin7
V Pin4
G Pin6

4.3 Connect to NanoPi M2 / NanoPi 2 Fire

Please refer to the following connection diagram to connect the module to the NanoPi M2/ NanoPi 2 Fire:
Matrix-Button_nanopi_m2

Connection Details:

Matrix-Button NanoPi M2
S Pin7
V Pin4
G Pin6

4.4 Connect to NanoPC-T2

Please refer to the following connection diagram to connect the module to the NanoPC-T2:
Matrix-Button_NanoPC-T2

Connection Details:

Matrix-Button NanoPC-T2
S Pin15
V Pin29
G Pin30

5 编译运行测试程序

启动开发板并运行Debian系统,进入系统后克隆Matrix代码仓库:

$ apt-get update && apt-get install git
$ git clone https://github.com/friendlyarm/matrix.git

克隆完成后会得到一个名为matrix的目录。

编译并安装Matrix:

$ cd matrix
$ make && make install

运行测试程序:

$ matrix-gpio_int

注意:此模块并不支持热插拔,启动系统前需要确保硬件连接正确。
运行效果如下:

Waiting event...
Device[0] value is 1

按下按键时会检测到事件。

6 代码说明

所有的开发板都共用一套Matrix代码,本模块的测试示例代码为matrix-gpio_int,内容如下:

int main(int argc, char ** argv)
{
    int i, board;
    int retSize = -1;
    char value[ARRAY_SIZE(dev)];
 
    if ((board = boardInit()) < 0)
        printf("Fail to init board\n");
 
    if (argc == 2) {
        dev[0].pin = atoi(argv[1]);
    }
    printf("Using GPIO_PIN(%d)\n", dev[0].pin);
    system("modprobe "DRIVER_MODULE);
    signal(SIGINT, intHandler);
    if (board == BOARD_NANOPI_T2)
        dev[0].pin = GPIO_PIN(15);
    if ((devFD =sensorInit(dev, ARRAY_SIZE(dev))) == -1) {
        printf("Fail to init sensor\n");
        return -1;
    }
    printf("Waiting event...\n");
    if ((retSize = sensorRead(devFD, value, ARRAY_SIZE(dev))) == -1) {
        printf("Fail to read sensors\n");
    }
    if (retSize > 0) {
        i = 0;
        for (i=0; i<retSize; i++) {
            printf("dev[%d] value: %d\n", i, value[i]);
        }
    }
    sensorDeinit(devFD);
    system("rmmod "DRIVER_MODULE);
    return 0;
}

API说明参考维基:Matrix API reference manual


7 Resources

8 Update Log

8.1 Feb-19-2016

  • In section 4 added NanoPi 2 branch
  • In section 5.2 added the driver and its source code's locations